Re: [patch 21/21] slab defrag: Obsolete SLAB

Matt Mackall
2008-05-14T19:50:07Z

On Wed, 2008-05-14 at 12:21 -0700, Christoph Lameter wrote:
> On Wed, 14 May 2008, Matt Mackall wrote:
>
> > > Interrupt exit in general would have to inspect the per cpu structures of
> > > all slab caches on the system?
> >
> > Why's that? When we're not under pressure (fast path), we can delay (and
> > batch) remote frees. When we are under pressure (slow path), we can do
> > everything immediately.
>
> Fastpath is what? I guess slow path means we called into the page
> allocator?

No, slow path here means we're already under memory pressure, so we
don't care if something takes longer if it saves memory.

--
Mathematics is the supreme nostalgia of our time.